X-Message-Number: 23220
Date: Mon, 05 Jan 2004 10:57:43 -0800
From: James Swayze <>
Subject: Global cookery kookery
References: <>

>Message #23217
>Date: Mon, 5 Jan 2004 13:49:00 +0800 (CST)
>From: =?big5?q?kurt2100kimo?= <>
>Subject: Climate
>
>Hello,
>
>I have something to tell you all,
>
>Through out most of its history, the normal
>temperature of the Earth is 22 degrees C. Today, it is
>12 deg C. We have been in an ice age for the past 10
>million years.
>
>Check out the website www.scotese.com/climate.htm and
>you'll see what I mean. 
>
>My point is that if global warming leads to a tropic
>Earth, it just means that the Earth's climate is
>returning to "normal" as defined through out most of
>geological history. You will note on the animated map,
>that "warm weather" places included almost the entire
>planet.
>
>Since I like warm climates, this suits me just fine.
>
>Start cranking up those CO2 generators.
>
>Kurt
>
Be careful what you wish for, you may get the opposite of what you think.

At first glance his, your conclusions, seem to me to be bad science at 
best. There are several things that come immediately to mind that make 
for serious problems trying to equate anything about the far remote past 
climate with today's.

First on this list would be the length day. If correctly recalled I 
believe it was far shorter than 24 hours in the past, more like 18 or 
fewer even. This would mean whatever plants did exist, not all of them 
the same as today -- far from it -- and this alone means there may be 
issues about rates of conversion that may be species specific, would 
have less sunshine for converting CO2 to O2 in a given day, making the 
climate then far warmer than capable of today.

Secondly, there is the proximity of the moon to the Earth. It was far 
closer in the past and is escaping us all the time. People widely know 
of the ocean tides but not of tidal forces on the land. Yes, the Earth's 
crust falls and rises several inches with the moon's orbit around us. 
This has to have effect upon tectonic forces and so I'd have to ask just 
how much more there might have been with the moon being much closer and 
the forces greater? Could it mean more volcanic activity, and due to 
this more CO2 and other greenhouse gases in the atmosphere, even the 
occasional cooling period for dust occlusion of the sun? Here again we 
can't reproduce any of this for today.

My point is that in trying to equate our climate with one so far removed 
and with artifacts that cannot be the same ever again it is pointless to 
use it as a preferable model. What matters to us now is the immediate 
future and that does not bode well for unrestrained human caused CO2 and 
other greenhouse emissions and what they might effect. And it's not 
warming to worry about, nay it is massive and rapid cooling.

I've said here before, here is the study 
http://www.essc.psu.edu/~bjhaupt/papers/guest.97/guest-sh.html#introduction 
[see below a list], if one fancies themselves science savvy then do 
check this out and point out for yourself and for me where they are wrong.

If they are not wrong than continuing to haphazardly warm the planet may 
plunge it into the next ice age. This happens quite logically from 
glacial melt water diluting the global thermohaline conveyor that by 
convection causes such things as the gulf stream to warm the higher 
latitudes by bringing southern warm water northward. This happens 
because salty water is heavier and falls in the north causing a vacuum 
effect to pull warmer water in after it. The net effect of this 
happening in myriad places all over the world makes for a delicately 
balanced global conveyor of water currents that keep this planet more or 
less evenly temperate. Make this saline water less saline by melting 
millions of tons of fresh water glaciers and do so too quickly for the 
system to adjust slowly and you are asking for trouble. Look far and 
wide before leaping, especially when ideology may be involved.

For the lay person, http://www.enviroliteracy.org/article.php/545.html

For the seriously science savvy, 


http://www.essc.psu.edu/~bjhaupt/papers/guest.97/guest-sh.html#modeling_of_the_global%20_conveyor

For the student, http://topex-www.jpl.nasa.gov/education/tutorial2.html
http://www.ocean.fsu.edu/~www/Courses/sp00H1001/aarguez/AnthonyApaper.html

 From google, 
http://www.google.com/search?hl=en&ie=UTF-8&q=global+conveyor&spell=1

James

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